Low interference lighting system

Abstract

A low-interference lighting system includes a housing, a voltage converter located within the housing, at least one pair of spaced-apart arms serving as electric elongated conductors extending from the housing, and a pair of special contact conductors for an external electrical device to tap into the electric elongated conductors. With respect to each arm, it includes an elongated conductor for carrying electric current and a grounded conducting shield surrounding, but electrically isolated from, the elongated conductor. External electrical devices, such as lamps make electrical contact with the elongated conductor via the contact conductors while insulated from the grounded conducting shield. In one embodiment, the pair of arms are rigid and in another embodiment, they are flexible.

It is claimed:  
     
       1. A low-interference lighting system, comprising: 
       a voltage converter for converting a first voltage to a second voltage, said second voltage having two poles;  
       a housing containing said voltage converter;  
       at least one pair of spaced-apart arms extending from said housing;  
       each arm further comprising:  
       an elongated conductor connectable to one pole of said second voltage;  
       a grounded conducting shield surrounding, but electrically isolated from, said elongated conductor; and  
       a contact conductor making electrical contact with said elongated conductor through a port on said conducting shield along said arm for supplying one pole of said second voltage to a lamp.  
     
     
       2. A low-interference lighting system as in claim  1 , wherein: 
       said contact conductor includes a conducting pin, said conducting pin further comprises:  
       a screwable head;  
       a shaft body having a screw head end and a tip end; and  
       a threaded insulator protecting a substantial portion of the shaft body but exposing the tip end such that when said contact conductor is screwed into the port on said grounded conducting shield, said contact conductor is making electrical contact with said elongated conductor but insulated from said grounded conducting shield.  
     
     
       3. A low-interference lighting system as in claim  1 , wherein said elongated conductor includes one that is a wire. 
     
     
       4. A low-interference lighting system as in claim  1 , wherein said elongated conductor includes one that is tubular. 
     
     
       5. A low-interference lighting system as in claim  1 , wherein: 
       each said arm is in the form of a coaxial cable having an inner conductor as said elongated conductor and concentric with an outer conducting shield as said grounded conducting shield.  
     
     
       6. A low-interference lighting system as in claim  5 , wherein: 
       said contact conductor includes a conducting screw for screwing into a cable-retaining receptacle nut, said conducting screw further comprises:  
       a screwable head;  
       a shaft body having a screw head end and a tip end;  
       an insulator sleeve protecting a substantial portion of the shaft body but exposing the tip end; and  
       an outer annular threaded body surrounding said insulator sleeve but exposing a portion of said insulator sleeve near the tip end such that when said contact conductor is screwed into the port on said grounded conducting shield, said contact conductor is making electrical contact with said elongated conductor but insulated from said grounded conducting shield.  
     
     
       7. A low-interference lighting system as in anyone of claims  1 - 6 , wherein: 
       said first voltage includes line voltage.  
     
     
       8. A low-interference lighting system as in anyone of claims  1 - 6 , wherein: 
       said second voltage includes one substantially lower than said first voltage.  
     
     
       9. A low-interference lighting system as in anyone of claims  1 - 6 , wherein: 
       said second voltage includes one having an alternating frequency substantially higher than that of said first voltage.  
     
     
       10. A low-interference lighting system as in anyone of claims  1 - 6 , wherein: 
       said elongated conductor and said grounded conducting shield form a concentric tubular arm.